Revert "Add ActiveStorage.service_configurations and ActiveStorage.service"

This reverts commit 002684e36e.

activestorage/app/models/active_storage/blob.rb

@@ -29,7 +29,7 @@ class ActiveStorage::Blob < ActiveRecord::Base
   has_secure_token :key
   store :metadata, accessors: [ :analyzed, :identified ], coder: ActiveRecord::Coders::JSON
 
-  class_attribute :service, default: ActiveStorage.service
+  class_attribute :service
 
   has_many :attachments
 

activestorage/lib/active_storage.rb

@@ -41,25 +41,19 @@ module ActiveStorage
   autoload :Previewer
   autoload :Analyzer
 
-  mattr_accessor :service_configurations, default: {}
-  mattr_accessor :service
-
-  mattr_accessor :queues,            default: {}
-  mattr_accessor :previewers,        default: []
-  mattr_accessor :analyzers,         default: []
-  mattr_accessor :variant_processor, default: :mini_magick
-  mattr_accessor :paths,             default: {}
-
-  mattr_accessor :variable_content_types,           default: []
-  mattr_accessor :content_types_to_serve_as_binary, default: []
-  mattr_accessor :content_types_allowed_inline,     default: []
-  mattr_accessor :binary_content_type,              default: "application/octet-stream"
-
-  mattr_accessor :service_urls_expire_in, default: 5.minutes
-  mattr_accessor :routes_prefix,          default: "/rails/active_storage"
-
   mattr_accessor :logger
   mattr_accessor :verifier
+  mattr_accessor :queues, default: {}
+  mattr_accessor :previewers, default: []
+  mattr_accessor :analyzers, default: []
+  mattr_accessor :variant_processor, default: :mini_magick
+  mattr_accessor :paths, default: {}
+  mattr_accessor :variable_content_types, default: []
+  mattr_accessor :content_types_to_serve_as_binary, default: []
+  mattr_accessor :content_types_allowed_inline, default: []
+  mattr_accessor :binary_content_type, default: "application/octet-stream"
+  mattr_accessor :service_urls_expire_in, default: 5.minutes
+  mattr_accessor :routes_prefix, default: "/rails/active_storage"
 
   module Transformers
     extend ActiveSupport::Autoload

activestorage/lib/active_storage/engine.rb

@@ -95,25 +95,25 @@ module ActiveStorage
     end
 
     initializer "active_storage.services" do
-      config.after_initialize do |app|
-        ActiveStorage.service_configurations = begin
-          config_file = Pathname.new(Rails.root.join("config/storage.yml"))
-          raise("Couldn't find Active Storage configuration in #{config_file}") unless config_file.exist?
+      ActiveSupport.on_load(:active_storage_blob) do
+        if config_choice = Rails.configuration.active_storage.service
+          configs = Rails.configuration.active_storage.service_configurations ||= begin
+            config_file = Pathname.new(Rails.root.join("config/storage.yml"))
+            raise("Couldn't find Active Storage configuration in #{config_file}") unless config_file.exist?
 
-          require "yaml"
-          require "erb"
+            require "yaml"
+            require "erb"
 
-          YAML.load(ERB.new(config_file.read).result) || {}
-        rescue Psych::SyntaxError => e
-          raise "YAML syntax error occurred while parsing #{config_file}. " \
-                "Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
-                "Error: #{e.message}"
-        end
+            YAML.load(ERB.new(config_file.read).result) || {}
+          rescue Psych::SyntaxError => e
+            raise "YAML syntax error occurred while parsing #{config_file}. " \
+                  "Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
+                  "Error: #{e.message}"
+          end
 
-        if global_service_name = app.config.active_storage.service
-          ActiveStorage.service =
+          ActiveStorage::Blob.service =
             begin
-              ActiveStorage::Service.configure(global_service_name)
+              ActiveStorage::Service.configure config_choice, configs
             rescue => e
               raise e, "Cannot load `Rails.config.active_storage.service`:\n#{e.message}", e.backtrace
             end

activestorage/lib/active_storage/service.rb

@@ -45,7 +45,7 @@ module ActiveStorage
       # Configure an Active Storage service by name from a set of configurations,
       # typically loaded from a YAML file. The Active Storage engine uses this
       # to set the global Active Storage service when the app boots.
-      def configure(service_name, configurations = ActiveStorage.service_configurations)
+      def configure(service_name, configurations)
         Configurator.build(service_name, configurations)
       end